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<h1 class="epydoc">Source Code for <a href="pypln.pypln.workers.pdfconv_worker-module.html">Module pypln.pypln.workers.pdfconv_worker</a></h1>
<pre class="py-src">
<a name="L1"></a><tt class="py-lineno"> 1</tt>  <tt class="py-line"><tt class="py-comment">#-*- coding:utf-8 -*-</tt> </tt>
<a name="L2"></a><tt class="py-lineno"> 2</tt>  <tt class="py-line"><tt class="py-docstring">"""</tt> </tt>
<a name="L3"></a><tt class="py-lineno"> 3</tt>  <tt class="py-line"><tt class="py-docstring">PDF to text conversion worker</tt> </tt>
<a name="L4"></a><tt class="py-lineno"> 4</tt>  <tt class="py-line"><tt class="py-docstring">"""</tt> </tt>
<a name="L5"></a><tt class="py-lineno"> 5</tt>  <tt class="py-line"><tt class="py-name">__docformat__</tt> <tt class="py-op">=</tt> <tt class="py-string">"restructuredtext en"</tt> </tt>
<a name="L6"></a><tt class="py-lineno"> 6</tt>  <tt class="py-line"> </tt>
<a name="L7"></a><tt class="py-lineno"> 7</tt>  <tt class="py-line"><tt class="py-keyword">import</tt> <tt class="py-name">subprocess</tt> </tt>
<a name="L8"></a><tt class="py-lineno"> 8</tt>  <tt class="py-line"><tt class="py-keyword">import</tt> <tt class="py-name">zmq</tt> </tt>
<a name="L9"></a><tt class="py-lineno"> 9</tt>  <tt class="py-line"><tt class="py-keyword">from</tt> <tt id="link-0" class="py-name" targets="Module pypln.pypln.sinks.base=pypln.pypln.sinks.base-module.html,Module pypln.pypln.workers.base=pypln.pypln.workers.base-module.html"><a title="pypln.pypln.sinks.base
pypln.pypln.workers.base" class="py-name" href="#" onclick="return doclink('link-0', 'base', 'link-0');">base</a></tt> <tt class="py-keyword">import</tt> <tt id="link-1" class="py-name" targets="Class pypln.pypln.workers.base.PushPullWorker=pypln.pypln.workers.base.PushPullWorker-class.html"><a title="pypln.pypln.workers.base.PushPullWorker" class="py-name" href="#" onclick="return doclink('link-1', 'PushPullWorker', 'link-1');">PushPullWorker</a></tt> </tt>
<a name="L10"></a><tt class="py-lineno">10</tt>  <tt class="py-line"><tt class="py-keyword">from</tt> <tt id="link-2" class="py-name" targets="Package pypln.pypln=pypln.pypln-module.html"><a title="pypln.pypln" class="py-name" href="#" onclick="return doclink('link-2', 'pypln', 'link-2');">pypln</a></tt><tt class="py-op">.</tt><tt id="link-3" class="py-name" targets="Package pypln.pypln.stores=pypln.pypln.stores-module.html"><a title="pypln.pypln.stores" class="py-name" href="#" onclick="return doclink('link-3', 'stores', 'link-3');">stores</a></tt> <tt class="py-keyword">import</tt> <tt id="link-4" class="py-name" targets="Module pypln.pypln.stores.filestor=pypln.pypln.stores.filestor-module.html"><a title="pypln.pypln.stores.filestor" class="py-name" href="#" onclick="return doclink('link-4', 'filestor', 'link-4');">filestor</a></tt> </tt>
<a name="L11"></a><tt class="py-lineno">11</tt>  <tt class="py-line"> </tt>
<a name="L12"></a><tt class="py-lineno">12</tt>  <tt class="py-line"><tt id="link-5" class="py-name" targets="Variable pypln.pypln.Monitors.graphite_monitor.context=pypln.pypln.Monitors.graphite_monitor-module.html#context,Variable pypln.pypln.servers.ventilator.context=pypln.pypln.servers.ventilator-module.html#context,Variable pypln.pypln.sinks.dummy_sink.context=pypln.pypln.sinks.dummy_sink-module.html#context,Variable pypln.pypln.sinks.mongo_insert_sink.context=pypln.pypln.sinks.mongo_insert_sink-module.html#context,Variable pypln.pypln.sinks.mongo_update_sink.context=pypln.pypln.sinks.mongo_update_sink-module.html#context,Variable pypln.pypln.sinks.raw_document_sink.context=pypln.pypln.sinks.raw_document_sink-module.html#context,Variable pypln.pypln.workers.enc_detect_worker.context=pypln.pypln.workers.enc_detect_worker-module.html#context,Variable pypln.pypln.workers.mime_detect_worker.context=pypln.pypln.workers.mime_detect_worker-module.html#context,Variable pypln.pypln.workers.palavras_worker.context=pypln.pypln.workers.palavras_worker-module.html#context,Variable pypln.pypln.workers.parser_worker.context=pypln.pypln.workers.parser_worker-module.html#context,Variable pypln.pypln.workers.pdfconv_worker.context=pypln.pypln.workers.pdfconv_worker-module.html#context,Variable pypln.pypln.workers.tagger_worker.context=pypln.pypln.workers.tagger_worker-module.html#context"><a title="pypln.pypln.Monitors.graphite_monitor.context
pypln.pypln.servers.ventilator.context
pypln.pypln.sinks.dummy_sink.context
pypln.pypln.sinks.mongo_insert_sink.context
pypln.pypln.sinks.mongo_update_sink.context
pypln.pypln.sinks.raw_document_sink.context
pypln.pypln.workers.enc_detect_worker.context
pypln.pypln.workers.mime_detect_worker.context
pypln.pypln.workers.palavras_worker.context
pypln.pypln.workers.parser_worker.context
pypln.pypln.workers.pdfconv_worker.context
pypln.pypln.workers.tagger_worker.context" class="py-name" href="#" onclick="return doclink('link-5', 'context', 'link-5');">context</a></tt> <tt class="py-op">=</tt> <tt class="py-name">zmq</tt><tt class="py-op">.</tt><tt class="py-name">Context</tt><tt class="py-op">(</tt><tt class="py-op">)</tt> </tt>
<a name="L13"></a><tt class="py-lineno">13</tt>  <tt class="py-line"> </tt>
<a name="PDFConverterWorker"></a><div id="PDFConverterWorker-def"><a name="L14"></a><tt class="py-lineno">14</tt> <a class="py-toggle" href="#" id="PDFConverterWorker-toggle" onclick="return toggle('PDFConverterWorker');">-</a><tt class="py-line"><tt class="py-keyword">class</tt> <a class="py-def-name" href="pypln.pypln.workers.pdfconv_worker.PDFConverterWorker-class.html">PDFConverterWorker</a><tt class="py-op">(</tt><tt class="py-base-class">PushPullWorker</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="PDFConverterWorker-collapsed" style="display:none;" pad="++" indent="++++"></div><div id="PDFConverterWorker-expanded"><a name="L15"></a><tt class="py-lineno">15</tt>  <tt class="py-line">    <tt class="py-docstring">"""</tt> </tt>
<a name="L16"></a><tt class="py-lineno">16</tt>  <tt class="py-line"><tt class="py-docstring">    Worker to extract text from PDF files</tt> </tt>
<a name="L17"></a><tt class="py-lineno">17</tt>  <tt class="py-line"><tt class="py-docstring">    Expects to receive  messages with the following format:</tt> </tt>
<a name="L18"></a><tt class="py-lineno">18</tt>  <tt class="py-line"><tt class="py-docstring">    {'md5':..., 'filename':..., 'date':} or {'jobid':n}</tt> </tt>
<a name="L19"></a><tt class="py-lineno">19</tt>  <tt class="py-line"><tt class="py-docstring">    """</tt> </tt>
<a name="L20"></a><tt class="py-lineno">20</tt>  <tt class="py-line">                 </tt>
<a name="PDFConverterWorker.process"></a><div id="PDFConverterWorker.process-def"><a name="L21"></a><tt class="py-lineno">21</tt> <a class="py-toggle" href="#" id="PDFConverterWorker.process-toggle" onclick="return toggle('PDFConverterWorker.process');">-</a><tt class="py-line">    <tt class="py-keyword">def</tt> <a class="py-def-name" href="pypln.pypln.workers.pdfconv_worker.PDFConverterWorker-class.html#process">process</a><tt class="py-op">(</tt><tt class="py-param">self</tt><tt class="py-op">,</tt><tt class="py-param">msg</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="PDFConverterWorker.process-collapsed" style="display:none;" pad="++" indent="++++++++"></div><div id="PDFConverterWorker.process-expanded"><a name="L22"></a><tt class="py-lineno">22</tt>  <tt class="py-line">        <tt class="py-docstring">"""</tt> </tt>
<a name="L23"></a><tt class="py-lineno">23</tt>  <tt class="py-line"><tt class="py-docstring">        Tries to convert a pdf to a text file using the unix command </tt> </tt>
<a name="L24"></a><tt class="py-lineno">24</tt>  <tt class="py-line"><tt class="py-docstring">        pdftotext.</tt> </tt>
<a name="L25"></a><tt class="py-lineno">25</tt>  <tt class="py-line"><tt class="py-docstring">        msg must be the a JSON object with the following structure: {'md5':..., 'filename':..., 'date':}</tt> </tt>
<a name="L26"></a><tt class="py-lineno">26</tt>  <tt class="py-line"><tt class="py-docstring">        """</tt> </tt>
<a name="L27"></a><tt class="py-lineno">27</tt>  <tt class="py-line">        <tt class="py-name">gridfs</tt> <tt class="py-op">=</tt> <tt id="link-6" class="py-name"><a title="pypln.pypln.stores.filestor" class="py-name" href="#" onclick="return doclink('link-6', 'filestor', 'link-4');">filestor</a></tt><tt class="py-op">.</tt><tt id="link-7" class="py-name" targets="Class pypln.pypln.stores.filestor.FS=pypln.pypln.stores.filestor.FS-class.html"><a title="pypln.pypln.stores.filestor.FS" class="py-name" href="#" onclick="return doclink('link-7', 'FS', 'link-7');">FS</a></tt><tt class="py-op">(</tt><tt class="py-name">msg</tt><tt class="py-op">[</tt><tt class="py-string">'database'</tt><tt class="py-op">]</tt><tt class="py-op">,</tt><tt class="py-name">msg</tt><tt class="py-op">[</tt><tt class="py-string">'collection'</tt><tt class="py-op">]</tt><tt class="py-op">)</tt> </tt>
<a name="L28"></a><tt class="py-lineno">28</tt>  <tt class="py-line">        <tt class="py-name">pdf</tt><tt class="py-op">=</tt> <tt class="py-name">gridfs</tt><tt class="py-op">.</tt><tt class="py-name">fs</tt><tt class="py-op">.</tt><tt class="py-name">get_last_version</tt><tt class="py-op">(</tt><tt class="py-name">md5</tt><tt class="py-op">=</tt><tt class="py-name">msg</tt><tt class="py-op">[</tt><tt class="py-string">'md5'</tt><tt class="py-op">]</tt><tt class="py-op">)</tt> </tt>
<a name="L29"></a><tt class="py-lineno">29</tt>  <tt class="py-line"><tt class="py-comment">#        print msg['md5']</tt> </tt>
<a name="L30"></a><tt class="py-lineno">30</tt>  <tt class="py-line">        <tt class="py-keyword">try</tt> <tt class="py-op">:</tt> </tt>
<a name="L31"></a><tt class="py-lineno">31</tt>  <tt class="py-line">            <tt class="py-name">p</tt> <tt class="py-op">=</tt> <tt class="py-name">subprocess</tt><tt class="py-op">.</tt><tt class="py-name">Popen</tt><tt class="py-op">(</tt><tt class="py-op">[</tt><tt class="py-string">'pdftotext'</tt><tt class="py-op">,</tt><tt class="py-string">'-q'</tt><tt class="py-op">,</tt><tt class="py-string">'-'</tt><tt class="py-op">,</tt><tt class="py-string">'-'</tt><tt class="py-op">]</tt><tt class="py-op">,</tt><tt class="py-name">stdin</tt><tt class="py-op">=</tt><tt class="py-name">subprocess</tt><tt class="py-op">.</tt><tt class="py-name">PIPE</tt><tt class="py-op">,</tt>  <tt class="py-name">stdout</tt><tt class="py-op">=</tt><tt class="py-name">subprocess</tt><tt class="py-op">.</tt><tt class="py-name">PIPE</tt><tt class="py-op">)</tt> </tt>
<a name="L32"></a><tt class="py-lineno">32</tt>  <tt class="py-line">            <tt class="py-name">stdout</tt><tt class="py-op">,</tt> <tt class="py-name">stderr</tt> <tt class="py-op">=</tt> <tt class="py-name">p</tt><tt class="py-op">.</tt><tt class="py-name">communicate</tt><tt class="py-op">(</tt><tt class="py-name">input</tt><tt class="py-op">=</tt><tt class="py-name">pdf</tt><tt class="py-op">.</tt><tt class="py-name">read</tt><tt class="py-op">(</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L33"></a><tt class="py-lineno">33</tt>  <tt class="py-line">        <tt class="py-keyword">except</tt> <tt class="py-name">OSError</tt><tt class="py-op">:</tt> </tt>
<a name="L34"></a><tt class="py-lineno">34</tt>  <tt class="py-line">            <tt class="py-name">p</tt><tt class="py-op">.</tt><tt class="py-name">kill</tt><tt class="py-op">(</tt><tt class="py-op">)</tt> </tt>
<a name="L35"></a><tt class="py-lineno">35</tt>  <tt class="py-line">            <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">sender</tt><tt class="py-op">.</tt><tt class="py-name">send_json</tt><tt class="py-op">(</tt><tt class="py-op">{</tt><tt class="py-string">'fail'</tt><tt class="py-op">:</tt><tt class="py-number">1</tt><tt class="py-op">}</tt><tt class="py-op">)</tt> </tt>
<a name="L36"></a><tt class="py-lineno">36</tt>  <tt class="py-line">            <tt class="py-keyword">return</tt> </tt>
<a name="L37"></a><tt class="py-lineno">37</tt>  <tt class="py-line">        <tt class="py-comment"># Assumes encoding is utf-8 which is not guaranteed. Although pdftotext attempts to convert to utf-8 it may not work.</tt> </tt>
<a name="L38"></a><tt class="py-lineno">38</tt>  <tt class="py-line">        <tt class="py-keyword">if</tt> <tt class="py-keyword">not</tt> <tt class="py-name">stdout</tt><tt class="py-op">:</tt> </tt>
<a name="L39"></a><tt class="py-lineno">39</tt>  <tt class="py-line">            <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">sender</tt><tt class="py-op">.</tt><tt class="py-name">send_json</tt><tt class="py-op">(</tt><tt class="py-op">{</tt><tt class="py-string">'fail'</tt><tt class="py-op">:</tt><tt class="py-number">1</tt><tt class="py-op">}</tt><tt class="py-op">)</tt> </tt>
<a name="L40"></a><tt class="py-lineno">40</tt>  <tt class="py-line">        <tt class="py-keyword">else</tt><tt class="py-op">:</tt> </tt>
<a name="L41"></a><tt class="py-lineno">41</tt>  <tt class="py-line">            <tt class="py-keyword">if</tt> <tt class="py-keyword">not</tt> <tt class="py-name">stderr</tt><tt class="py-op">:</tt> </tt>
<a name="L42"></a><tt class="py-lineno">42</tt>  <tt class="py-line">                <tt class="py-name">msgout</tt> <tt class="py-op">=</tt> <tt class="py-op">{</tt><tt class="py-string">'filename'</tt><tt class="py-op">:</tt><tt class="py-name">pdf</tt><tt class="py-op">.</tt><tt class="py-name">filename</tt><tt class="py-op">,</tt><tt class="py-string">'text'</tt><tt class="py-op">:</tt><tt class="py-name">stdout</tt><tt class="py-op">.</tt><tt class="py-name">strip</tt><tt class="py-op">(</tt><tt class="py-op">)</tt><tt class="py-op">,</tt><tt class="py-string">'database'</tt><tt class="py-op">:</tt><tt class="py-name">msg</tt><tt class="py-op">[</tt><tt class="py-string">'database'</tt><tt class="py-op">]</tt><tt class="py-op">,</tt><tt class="py-string">'collection'</tt><tt class="py-op">:</tt><tt class="py-name">msg</tt><tt class="py-op">[</tt><tt class="py-string">'collection'</tt><tt class="py-op">]</tt><tt class="py-op">}</tt> <tt class="py-comment">#stripping to remove non-printing characters</tt> </tt>
<a name="L43"></a><tt class="py-lineno">43</tt>  <tt class="py-line">                <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">sender</tt><tt class="py-op">.</tt><tt class="py-name">send_json</tt><tt class="py-op">(</tt><tt class="py-name">msgout</tt><tt class="py-op">)</tt> </tt>
<a name="L44"></a><tt class="py-lineno">44</tt>  <tt class="py-line">            <tt class="py-keyword">else</tt><tt class="py-op">:</tt> </tt>
<a name="L45"></a><tt class="py-lineno">45</tt>  <tt class="py-line">                <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">sender</tt><tt class="py-op">.</tt><tt class="py-name">send_json</tt><tt class="py-op">(</tt><tt class="py-op">{</tt><tt class="py-string">'fail'</tt><tt class="py-op">:</tt><tt class="py-number">1</tt><tt class="py-op">}</tt><tt class="py-op">)</tt> </tt>
<a name="L46"></a><tt class="py-lineno">46</tt>  <tt class="py-line">                <tt class="py-name">p</tt><tt class="py-op">.</tt><tt class="py-name">kill</tt><tt class="py-op">(</tt><tt class="py-op">)</tt> </tt>
</div></div><a name="L47"></a><tt class="py-lineno">47</tt>  <tt class="py-line"> </tt>
<a name="L48"></a><tt class="py-lineno">48</tt>  <tt class="py-line"> </tt>
<a name="L49"></a><tt class="py-lineno">49</tt>  <tt class="py-line"> </tt>
<a name="L50"></a><tt class="py-lineno">50</tt>  <tt class="py-line"><tt class="py-keyword">if</tt> <tt class="py-name">__name__</tt><tt class="py-op">==</tt><tt class="py-string">"__main__"</tt><tt class="py-op">:</tt> </tt>
<a name="L51"></a><tt class="py-lineno">51</tt>  <tt class="py-line">    <tt class="py-comment"># this is run when worker is spawned directly from the console</tt> </tt>
<a name="L52"></a><tt class="py-lineno">52</tt>  <tt class="py-line">    <tt class="py-name">W</tt><tt class="py-op">=</tt><tt id="link-8" class="py-name" targets="Class pypln.pypln.workers.pdfconv_worker.PDFConverterWorker=pypln.pypln.workers.pdfconv_worker.PDFConverterWorker-class.html"><a title="pypln.pypln.workers.pdfconv_worker.PDFConverterWorker" class="py-name" href="#" onclick="return doclink('link-8', 'PDFConverterWorker', 'link-8');">PDFConverterWorker</a></tt><tt class="py-op">(</tt><tt class="py-op">)</tt> </tt>
<a name="L53"></a><tt class="py-lineno">53</tt>  <tt class="py-line">    <tt class="py-name">W</tt><tt class="py-op">(</tt><tt class="py-op">)</tt> </tt>
<a name="L54"></a><tt class="py-lineno">54</tt>  <tt class="py-line"> </tt><script type="text/javascript">
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